It has been my understanding the the Father's throne is mobile, if that be the case, another possibility could be that the Father had move his throne closer to our plant during the Son's stay?

I happen to believe in Ellen White. I don't believe she would make this statement if it were not true.

The love of God must reign supreme; Christ must occupy an undivided throne. {AH 127.2}

God has bought us, and He claims a throne in each heart. {6BC 1088.5}

The throne of grace represents the kingdom of grace; for the existence of a throne implies the existence of a kingdom. In many of His parables Christ uses the expression "the kingdom of heaven" to designate the work of divine grace upon the hearts of men. {GC 346.4}

So the throne of glory represents the kingdom of glory; and this kingdom is referred to in the Saviour's words: "When the Son of man shall come in His glory, and all the holy angels with Him, then shall He sit upon the throne of His glory: and before Him shall be gathered all nations." Matthew 25:31, 32. This kingdom is yet future. It is not to be set up until the second advent of Christ. {GC 347.1}

The sanctuary in heaven, in which Jesus ministers in our behalf, is the great original, of which the sanctuary built by Moses was a copy. {GC 414.1}

Thus those who were studying the subject found indisputable proof of the existence of a sanctuary in heaven. Moses made the earthly sanctuary after a pattern which was shown him. Paul teaches that that pattern was the true sanctuary which is in heaven. And John testifies that he saw it in heaven. {GC 415.1}

In the temple in heaven, the dwelling place of God, His throne is established in righteousness and judgment. {GC 415.2}

Yes, that's very possible. He could have hidden behind the moon or one of the planets. But that still doesn't explain the 7-day travel of the redeemed.

I'm guessing that there are still some things that human science has not yet discovered.

I saw the Father rise from the throne, and in a flaming chariot go into the holy of holies within the veil, and sit down. . . . Then a cloudy chariot, with wheels like flaming fire, surrounded by angels, came to where Jesus was. He stepped into the chariot and was borne to the holiest, where the Father sat. There I beheld Jesus, a great High Priest, standing before the Father. God's Amazing Grace (1973), page 70, -72

"I Beheld," says the prophet Daniel, "till the thrones were cast down, and the Ancient of days did sit, whose garment was white as snow, and the hair of his head like the pure wool; his throne was like the fiery flame, and his wheels as burning fire. A fiery stream issued and came forth from before him; thousand thousands ministered unto him, and ten thousand times ten thousand stood before him; the Judgment was set, and the books were opened." "And, behold, one like the Son of man came with the clouds of heaven, and came to the Ancient of days, and they brought him near before him. And there was given him dominion, and glory, and a kingdom, that all people, nations, and languages should serve him; his dominion is an everlasting dominion, which shall not pass away." [Daniel 7:9, 10, 13, 14.] {4SP 307.1}

Here is another quote about the throne on wheels ...

. 26And above the firmament that was over their heads was the likeness of a throne, as the appearance of a sapphire stone: and upon the likeness of the throne was the likeness as the appearance of a man above upon it.

27And I saw as the colour of amber, as the appearance of fire round about within it, from the appearance of his loins even upward, and from the appearance of his loins even downward, I saw as it were the appearance of fire, and it had brightness round about.

28As the appearance of the bow that is in the cloud in the day of rain, so was the appearance of the brightness round about. This was the appearance of the likeness of the glory of the LORD. And when I saw it, I fell upon my face, and I heard a voice of one that spake.

From what I have been reading it seems that God's throne isn't necessarily confined to only one location, but also is moved from one location to another location.

Function: noun
Etymology:
Middle English trone, throne, from Anglo-French trone, from Latin thronus, from Greek thronos — more at firm
Date: 13th century

1 a: the chair of state of a sovereign or high dignitary (as a bishop)
b: the seat of a deity
2: royal power and dignity : sovereignty

"A throne is the official chair or seat upon which a monarch is seated on state or ceremonial occasions.

" 'Throne' in an abstract sense can also refer to the monarchy or the Crown itself."

"Thrones have been the symbol of monarchs and deities since ancient times. In some cultures, an early form of the throne was used in coronation ceremonies, or to lift the monarch up above all others present. Thrones have ever since been associated with royal power."

"The word 'throne' appears in the Bible 176 times ("thrones," in the plural, appears 9 times). God is described as seated upon a throne in the manner of kings, as a sign of his sovereignty over creation."

In thinking of "throne" in human terms; when a king is in power, and is the "ruler," he is always on the throne, no matter where he is, or what he is doing.